1. After switching jobs, Ava's current salary is $78,000. If she was earning $60,000 at her previous job, what is the percent of increase in her salary?

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2. Simplify completely:

8 10 + 3 360

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3. Solve for x:

3x -53 = -2(3x+4)

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4. Solve for x:

5x/3 7/ 2 = 14/6

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5. a) Solve for x:

2x 4x 6

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b) Graph the solution set

Solution:

c) Write the solution in the interval notation

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6. a) Solve for x:

x 3 5

solution:

b) Graph the solution set

Solution:

c) Write the solution in the interval notation

Solution:

7. Find the equation of the line passing through the points (2, 4) and (7, 23).

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8. Find the equation of the vertical line passing through the points (10, 9)

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9. Find the x-intercept, y-intercept and slope for the line given below

7x - 9y = -27

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10. a) From the early 1970's through 2001, the rate of obesity in young American children, ages 6 to 11, has shown a linear increase. In 1988, approximately 10.23 % of 6-11 year old American children were obese. By 2001, the rate of obese American had risen to 15 %. Write a linear model that would model these data where t = time in year after 1988 and R is the Rate of obesity as a percentage. Round your answer to two decimal places if necessary.

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b) Use this model to predict the 2016 obesity rate among 6-11 year-old American children.